/* SPDX-License-Identifier: BSD-2-Clause */

/**
 * @file
 *
 * @ingroup POSIX_AIO
 *
 * @brief Asynchronous write operation.
 */

/*
 * Copyright 2010, Alin Rus <alin.codejunkie@gmail.com> 
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <aio.h>
#include <errno.h>
#include <fcntl.h>
#include <rtems/posix/aio_misc.h>
#include <rtems/seterr.h>
#include <stdlib.h>
#include <limits.h>

int aio_write( struct aiocb *aiocbp )
{
  rtems_aio_request *req;
  int mode;

  if ( aiocbp == NULL )
    rtems_set_errno_and_return_minus_one( EINVAL );
  
  mode = fcntl( aiocbp->aio_fildes, F_GETFL );
  if (
    !(
      ( ( mode&O_ACCMODE ) == O_WRONLY ) ||
      ( ( mode&O_ACCMODE ) == O_RDWR )
    )
  )
    rtems_set_errno_and_return_minus_one( EBADF );

  if ( aiocbp->aio_reqprio < 0 || aiocbp->aio_reqprio > AIO_PRIO_DELTA_MAX )
    rtems_set_errno_and_return_minus_one( EINVAL );

  if ( aiocbp->aio_offset < 0 )
    rtems_set_errno_and_return_minus_one( EINVAL );

  if ( rtems_aio_check_sigevent( &aiocbp->aio_sigevent ) == 0 )
    rtems_set_errno_and_return_minus_one( EINVAL );

  req = malloc( sizeof( rtems_aio_request ) );
  if ( req == NULL )
    rtems_set_errno_and_return_minus_one( EAGAIN );

  req->aiocbp = aiocbp;
  req->op_type = AIO_OP_WRITE;

  return rtems_aio_enqueue( req );
}

